Condensed Consolidated Statements Of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning Balance at Dec. 31, 2018		$ 1,751	$ 276,062	$ 1,997,785	$ (268,808)	$ (1,125,525)
Beginning Balance (in shares) at Dec. 31, 2018		110,430
Increase (Decrease) in Stockholders' Equity
Net income	$ 46,742			46,742
Other comprehensive (loss) income	$ (3,623)				(3,623)
Dividends declared on common stock				(12,447)
Dividends per share (usd per share)	$ 0.11
Stock compensation expense			3,909
Net issuance of treasury stock for vested restricted stock units (in shares)		698
Net issuance of treasury stock for vested restricted stock units			(3,536)			(11,510)
Adoption of accounting standards updates related to credit losses in 2020 and leases in 2019				(593)
Repurchases of common stock						0
Repurchases of common stock, shares		0
Ending Balance at Mar. 31, 2019	$ 900,207	$ 1,751	276,435	2,031,487	(272,431)	(1,137,035)
Ending Balance (in shares) at Mar. 31, 2019		111,128
Beginning Balance at Dec. 31, 2019	1,023,322	$ 1,751	289,422	2,141,302	(259,742)	(1,149,411)
Beginning Balance (in shares) at Dec. 31, 2019		110,780
Increase (Decrease) in Stockholders' Equity
Net income	57,600			57,600
Other comprehensive (loss) income	$ (37,955)				(37,955)
Dividends declared on common stock				(13,546)
Dividends per share (usd per share)	$ 0.12
Stock compensation expense			4,483
Net issuance of treasury stock for vested restricted stock units (in shares)		313
Net issuance of treasury stock for vested restricted stock units			(1,622)			(4,108)
Adoption of accounting standards updates related to credit losses in 2020 and leases in 2019				(665)
Repurchases of common stock						(6,934)
Repurchases of common stock, shares		(259)
Ending Balance at Mar. 31, 2020	$ 1,020,575	$ 1,751	$ 292,283	$ 2,184,691	$ (297,697)	$ (1,160,453)
Ending Balance (in shares) at Mar. 31, 2020		110,834